So it changed, you start with mirror sounders on 1930s and you will towed magnetometers put in order to locate submarines for the Second Globe Conflict. During the 1956, Maurice Ewing and Bruce Heezen regarding Columbia College or university noticed that certain earthquakes coincided for the crests out of understood oceanic ridges. Of the 1960, that they had oriented the existence of Earth’s longest slope chain, wandering the means for 60,100 kilometer along the axis of your Atlantic Sea, around South Africa into the center of your own Indian Water. Read more